/**
 * @file	
 * @author	chipsea
 * @brief	
 * @version	0.1
 * @date	2020-11-30
 * @copyright Copyright (c) 2020, CHIPSEA Co., Ltd.
 * @note
 */


/*********************************************************************
 * INCLUDES
 */
#include "bcomdef.h"
#include "OSAL.h"
#include "hci.h"
#include "l2cap.h"
#include "gap.h"
#include "linkdb.h"
#include "att.h"
#include "gatt.h"
#include "osal_snv.h"
#include "hci_tl.h"

#include "peripheralBroadcaster.h"
#include "gapbondmgr.h"

/*********************************************************************
 * MACROS
 */

/*********************************************************************
 * CONSTANTS
 */
// Profile Events
#define START_ADVERTISING_EVT         0x0001  
#define RSSI_READ_EVT                 0x0002
#define UPDATE_PARAMS_TIMEOUT_EVT     0x0004

#define DEFAULT_ADVERT_OFF_TIME       30000   // 30 seconds

#define RSSI_NOT_AVAILABLE            127

#define DEFAULT_MIN_CONN_INTERVAL     0x0006  // 100 milliseconds
#define DEFAULT_MAX_CONN_INTERVAL     0x0C80  // 4 seconds

#define MIN_CONN_INTERVAL             0x0006
#define MAX_CONN_INTERVAL             0x0C80

#define DEFAULT_SLAVE_LATENCY         0
#define DEFAULT_TIMEOUT_MULTIPLIER    1000

#define CONN_INTERVAL_MULTIPLIER      6

#define MAX_SLAVE_LATENCY             500
#define MIN_TIMEOUT_MULTIPLIER        0x000a
#define MAX_TIMEOUT_MULTIPLIER        0x0c80

#define MAX_TIMEOUT_VALUE             0xFFFF

/*********************************************************************
 * TYPEDEFS
 */

/*********************************************************************
 * GLOBAL VARIABLES
 */

/*********************************************************************
 * EXTERNAL VARIABLES
 */

/*********************************************************************
 * EXTERNAL FUNCTIONS
 */

/*********************************************************************
 * LOCAL VARIABLES
 */
static uint8 gapRole_TaskID;   // Task ID for internal task/event processing

static gaprole_States_t gapRole_state;

/*********************************************************************
 * Profile Parameters - reference GAPROLE_PROFILE_PARAMETERS for
 * descriptions
 */

static uint8  gapRole_profileRole;
static uint8  gapRole_IRK[KEYLEN];
static uint8  gapRole_SRK[KEYLEN];
static uint32 gapRole_signCounter;
static uint8  gapRole_bdAddr[B_ADDR_LEN];
static uint8  gapRole_AdvEnabled = TRUE;
static uint16 gapRole_AdvertOffTime = DEFAULT_ADVERT_OFF_TIME;
static uint8  gapRole_AdvertDataLen = 3;
static uint8  gapRole_AdvertData[B_MAX_ADV_LEN] =
{
  0x02,   // length of this data
  GAP_ADTYPE_FLAGS,   // AD Type = Flags
  // Limited Discoverable & BR/EDR not supported
  (GAP_ADTYPE_FLAGS_GENERAL | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED),   
  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
static uint8  gapRole_ScanRspDataLen = 0;
static uint8  gapRole_ScanRspData[B_MAX_ADV_LEN] = {0};
static uint8  gapRole_AdvEventType;
static uint8  gapRole_AdvDirectType;
static uint8  gapRole_AdvDirectAddr[B_ADDR_LEN] = {0};
static uint8  gapRole_AdvChanMap;
static uint8  gapRole_AdvFilterPolicy;

static uint16 gapRole_ConnectionHandle = INVALID_CONNHANDLE;
static uint16 gapRole_RSSIReadRate = 0;

static gapRolesCBs_t *pGapRoles_AppCGs = NULL;
static uint8  gapRole_ConnectedDevAddr[B_ADDR_LEN] = {0};

static uint8  gapRole_ParamUpdateEnable = FALSE;
static uint16 gapRole_MinConnInterval = DEFAULT_MIN_CONN_INTERVAL;
static uint16 gapRole_MaxConnInterval = DEFAULT_MAX_CONN_INTERVAL;
static uint16 gapRole_SlaveLatency = DEFAULT_SLAVE_LATENCY;
static uint16 gapRole_TimeoutMultiplier = DEFAULT_TIMEOUT_MULTIPLIER;


/*********************************************************************
 * Profile Attributes - variables
 */

/*********************************************************************
 * Profile Attributes - Table
 */

/*********************************************************************
 * LOCAL FUNCTIONS
 */
static void gapRole_ProcessOSALMsg( osal_event_hdr_t *pMsg );
static void gapRole_ProcessGAPMsg( gapEventHdr_t *pMsg );
static void gapRole_SetupGAP( void );
static void gapRole_SendUpdateParam( uint16 connInterval, uint16 connLatency );

/*********************************************************************
 * NETWORK LAYER CALLBACKS
 */

/*********************************************************************
 * PUBLIC FUNCTIONS
 */

/*********************************************************************
 * @brief   Set a GAP Role parameter.
 *
 * Public function defined in peripheral.h.
 */
bStatus_t GAPRole_SetParameter( uint16 param, uint8 len, void *pValue )
{
  bStatus_t ret = SUCCESS;
  switch ( param )
  {
    case GAPROLE_IRK:
      if ( len == KEYLEN )
      {
        VOID osal_memcpy( gapRole_IRK, pValue, KEYLEN ) ;
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_SRK:
      if ( len == KEYLEN )
      {
        VOID osal_memcpy( gapRole_SRK, pValue, KEYLEN ) ;
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_SIGNCOUNTER:
      if ( len == sizeof ( uint32 ) )
      {
        gapRole_signCounter = *((uint32*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADVERT_ENABLED:
      if ( len == sizeof( uint8 ) )
      {
        if ( (gapRole_state == GAPROLE_CONNECTED) || (gapRole_state == GAPROLE_CONNECTED_ADV) )
        {
          uint8 advEnabled = *((uint8*)pValue);

          if ( (gapRole_state == GAPROLE_CONNECTED) && (advEnabled == TRUE) )
          {
            // Turn on advertising
            osal_set_event( gapRole_TaskID, START_ADVERTISING_EVT );
          }
          else if ( (gapRole_state == GAPROLE_CONNECTED_ADV) && (advEnabled == FALSE) )
          {
            // Turn off Advertising
            GAP_EndDiscoverable( gapRole_TaskID );
          }
        }
        else
        {
          uint8 oldAdvEnabled = gapRole_AdvEnabled;
          gapRole_AdvEnabled = *((uint8*)pValue);

          if ( (oldAdvEnabled) && (gapRole_AdvEnabled == FALSE) )
          {
            // Turn off Advertising
            VOID GAP_EndDiscoverable( gapRole_TaskID );
          }
          else if ( (oldAdvEnabled == FALSE) && (gapRole_AdvEnabled) )
          {
            // Turn on Advertising
            if ( (gapRole_state == GAPROLE_STARTED)
                || (gapRole_state == GAPROLE_WAITING )
                || (gapRole_state == GAPROLE_WAITING_AFTER_TIMEOUT) )
            {
            VOID osal_set_event( gapRole_TaskID, START_ADVERTISING_EVT );
            }
          }
        }
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADVERT_OFF_TIME:
      if ( len == sizeof ( uint16 ) )
      {
        gapRole_AdvertOffTime = *((uint16*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADVERT_DATA:
      if ( len <= B_MAX_ADV_LEN )
      {
        VOID osal_memset( gapRole_AdvertData, 0, B_MAX_ADV_LEN );
        VOID osal_memcpy( gapRole_AdvertData, pValue, len );
        gapRole_AdvertDataLen = len;
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_SCAN_RSP_DATA:
      if ( len <= B_MAX_ADV_LEN )
      {
        VOID osal_memset( gapRole_ScanRspData, 0, B_MAX_ADV_LEN );
        VOID osal_memcpy( gapRole_ScanRspData, pValue, len );
        gapRole_ScanRspDataLen = len;
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADV_EVENT_TYPE:
      if ( (len == sizeof ( uint8 )) && (*((uint8*)pValue) <= GAP_ADTYPE_ADV_LDC_DIRECT_IND) )
      {
        gapRole_AdvEventType = *((uint8*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADV_DIRECT_TYPE:
      if ( (len == sizeof ( uint8 )) && (*((uint8*)pValue) <= ADDRTYPE_PRIVATE_RESOLVE) )
      {
        gapRole_AdvDirectType = *((uint8*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADV_DIRECT_ADDR:
      if ( len == B_ADDR_LEN )
      {
        VOID osal_memcpy( gapRole_AdvDirectAddr, pValue, B_ADDR_LEN ) ;
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADV_CHANNEL_MAP:
      if ( (len == sizeof ( uint8 )) && (*((uint8*)pValue) <= 0x07) )
      {
        gapRole_AdvChanMap = *((uint8*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_ADV_FILTER_POLICY:
      if ( (len == sizeof ( uint8 )) && (*((uint8*)pValue) <= GAP_FILTER_POLICY_WHITE) )
      {
        gapRole_AdvFilterPolicy = *((uint8*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_RSSI_READ_RATE:
      if ( len == sizeof ( uint16 ) )
      {
        gapRole_RSSIReadRate = *((uint16*)pValue);

        if ( (gapRole_RSSIReadRate) && (gapRole_state == GAPROLE_CONNECTED) )
        {
          // Start the RSSI Reads
          VOID osal_start_timerEx( gapRole_TaskID, RSSI_READ_EVT, gapRole_RSSIReadRate );
        }
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GAPROLE_PARAM_UPDATE_ENABLE:
      if ( (len == sizeof ( uint8 )) && (*((uint8*)pValue) <= TRUE) )
      {
        gapRole_ParamUpdateEnable = *((uint8*)pValue);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;
       
    case GAPROLE_MIN_CONN_INTERVAL:
      {
        uint16 newInterval = *((uint16*)pValue);
        if (   len == sizeof ( uint16 )           &&
             ( newInterval >= MIN_CONN_INTERVAL ) && 
             ( newInterval <= MAX_CONN_INTERVAL ) )
        {
          gapRole_MinConnInterval = newInterval;
        }
        else
        {
          ret = bleInvalidRange;
        }
      }
      break;

    case GAPROLE_MAX_CONN_INTERVAL:
      {
        uint16 newInterval = *((uint16*)pValue);
        if (   len == sizeof ( uint16 )          &&
             ( newInterval >= MIN_CONN_INTERVAL) &&
             ( newInterval <= MAX_CONN_INTERVAL) ) 
        {
          gapRole_MaxConnInterval = newInterval;
        }
        else
        {
          ret = bleInvalidRange;
        }
      }
      break;

    case GAPROLE_SLAVE_LATENCY:
      {
        uint16 latency = *((uint16*)pValue);
        if ( len == sizeof ( uint16 ) && (latency < MAX_SLAVE_LATENCY) )
        {
          gapRole_SlaveLatency = latency;
        }
        else
        {
          ret = bleInvalidRange;
        }
      }
      break;

    case GAPROLE_TIMEOUT_MULTIPLIER:
      {
        uint16 newTimeout = *((uint16*)pValue);
        if ( len == sizeof ( uint16 )
            && (newTimeout >= MIN_TIMEOUT_MULTIPLIER) && (newTimeout <= MAX_TIMEOUT_MULTIPLIER) )
        {
          gapRole_TimeoutMultiplier = newTimeout;
        }
        else
        {
          ret = bleInvalidRange;
        }
      }
      break;

    default:
      // The param value isn't part of this profile, try the GAP.
      if ( (param < TGAP_PARAMID_MAX) && (len == sizeof ( uint16 )) )
      {
        ret = GAP_SetParamValue( param, *((uint16*)pValue) );
      }
      else
      {
        ret = INVALIDPARAMETER;
      }
      break;
  }

  return ( ret );
}

/*********************************************************************
 * @brief   Get a GAP Role parameter.
 *
 * Public function defined in peripheral.h.
 */
bStatus_t GAPRole_GetParameter( uint16 param, void *pValue )
{
  bStatus_t ret = SUCCESS;
  switch ( param )
  {
    case GAPROLE_PROFILEROLE:
      *((uint8*)pValue) = gapRole_profileRole;
      break;

    case GAPROLE_IRK:
      VOID osal_memcpy( pValue, gapRole_IRK, KEYLEN ) ;
      break;

    case GAPROLE_SRK:
      VOID osal_memcpy( pValue, gapRole_SRK, KEYLEN ) ;
      break;

    case GAPROLE_SIGNCOUNTER:
      *((uint32*)pValue) = gapRole_signCounter;
      break;

    case GAPROLE_BD_ADDR:
      VOID osal_memcpy( pValue, gapRole_bdAddr, B_ADDR_LEN ) ;
      break;

    case GAPROLE_ADVERT_ENABLED:
      *((uint8*)pValue) = gapRole_AdvEnabled;
      break;

    case GAPROLE_ADVERT_OFF_TIME:
      *((uint16*)pValue) = gapRole_AdvertOffTime;
      break;

    case GAPROLE_ADVERT_DATA:
      VOID osal_memcpy( pValue , gapRole_AdvertData, gapRole_AdvertDataLen );
      break;

    case GAPROLE_SCAN_RSP_DATA:
      VOID osal_memcpy( pValue, gapRole_ScanRspData, gapRole_ScanRspDataLen ) ;
      break;

    case GAPROLE_ADV_EVENT_TYPE:
      *((uint8*)pValue) = gapRole_AdvEventType;
      break;

    case GAPROLE_ADV_DIRECT_TYPE:
      *((uint8*)pValue) = gapRole_AdvDirectType;
      break;

    case GAPROLE_ADV_DIRECT_ADDR:
      VOID osal_memcpy( pValue, gapRole_AdvDirectAddr, B_ADDR_LEN ) ;
      break;

    case GAPROLE_ADV_CHANNEL_MAP:
      *((uint8*)pValue) = gapRole_AdvChanMap;
      break;

    case GAPROLE_ADV_FILTER_POLICY:
      *((uint8*)pValue) = gapRole_AdvFilterPolicy;
      break;

    case GAPROLE_CONNHANDLE:
      *((uint16*)pValue) = gapRole_ConnectionHandle;
      break;

    case GAPROLE_RSSI_READ_RATE:
      *((uint16*)pValue) = gapRole_RSSIReadRate;
      break;

    case GAPROLE_PARAM_UPDATE_ENABLE:
      *((uint16*)pValue) = gapRole_ParamUpdateEnable;
      break;
      
    case GAPROLE_MIN_CONN_INTERVAL:
      *((uint16*)pValue) = gapRole_MinConnInterval;
      break;

    case GAPROLE_MAX_CONN_INTERVAL:
      *((uint16*)pValue) = gapRole_MaxConnInterval;
      break;

    case GAPROLE_SLAVE_LATENCY:
      *((uint16*)pValue) = gapRole_SlaveLatency;
      break;

    case GAPROLE_TIMEOUT_MULTIPLIER:
      *((uint16*)pValue) = gapRole_TimeoutMultiplier;
      break;
      
    case GAPROLE_CONN_BD_ADDR:
      VOID osal_memcpy( pValue, gapRole_ConnectedDevAddr, B_ADDR_LEN ) ;
      break;

    default:
      // The param value isn't part of this profile, try the GAP.
      if ( param < TGAP_PARAMID_MAX )
      {
        *((uint16*)pValue) = GAP_GetParamValue( param );
      }
      else
      {
        ret = INVALIDPARAMETER;
      }
      break;
  }

  return ( ret );
}

/*********************************************************************
 * @brief   Does the device initialization.
 *
 * Public function defined in peripheral.h.
 */
bStatus_t GAPRole_StartDevice( gapRolesCBs_t *pAppCallbacks )
{
  if ( gapRole_state == GAPROLE_INIT )
  {
    // Clear all of the Application callbacks
    if ( pAppCallbacks )
    {
      pGapRoles_AppCGs = pAppCallbacks;
    }

    // Start the GAP
    gapRole_SetupGAP();

    return ( SUCCESS );
  }
  else
  {
    return ( bleAlreadyInRequestedMode );
  }
}

/*********************************************************************
 * @brief   Terminates the existing connection.
 *
 * Public function defined in peripheral.h.
 */
bStatus_t GAPRole_TerminateConnection( void )
{
  if ( (gapRole_state == GAPROLE_CONNECTED)
      || (gapRole_state == GAPROLE_CONNECTED_ADV) )
  {
    return ( GAP_TerminateLinkReq( gapRole_TaskID, gapRole_ConnectionHandle, 
                                   HCI_DISCONNECT_REMOTE_USER_TERM ) );
  }
  else
  {
    return ( bleIncorrectMode );
  }
}

/*********************************************************************
 * LOCAL FUNCTION PROTOTYPES
 */

/*********************************************************************
 * @brief   Task Initialization function.
 *
 * Internal function defined in peripheral.h.
 */
void GAPRole_Init( uint8 task_id )
{
  gapRole_TaskID = task_id;

  gapRole_state = GAPROLE_INIT;
  gapRole_ConnectionHandle = INVALID_CONNHANDLE;

  GAP_RegisterForHCIMsgs( gapRole_TaskID );
  
  // Initialize the Profile Advertising and Connection Parameters
  gapRole_profileRole = (GAP_PROFILE_PERIPHERAL | GAP_PROFILE_BROADCASTER);
  VOID osal_memset( gapRole_IRK, 0, KEYLEN );
  VOID osal_memset( gapRole_SRK, 0, KEYLEN );
  gapRole_signCounter = 0;
  gapRole_AdvEventType = GAP_ADTYPE_ADV_IND;
  gapRole_AdvDirectType = ADDRTYPE_PUBLIC;
  gapRole_AdvChanMap = GAP_ADVCHAN_ALL;
  gapRole_AdvFilterPolicy = GAP_FILTER_POLICY_ALL;

  // Restore Items from NV
  VOID osal_snv_read( BLE_NVID_IRK, KEYLEN, gapRole_IRK );
  VOID osal_snv_read( BLE_NVID_CSRK, KEYLEN, gapRole_SRK );
  VOID osal_snv_read( BLE_NVID_SIGNCOUNTER, sizeof( uint32 ), &gapRole_signCounter );
}

/*********************************************************************
 * @brief   Task Event Processor function.
 *
 * Internal function defined in peripheral.h.
 */
uint16 GAPRole_ProcessEvent( uint8 task_id, uint16 events )
{
  VOID task_id; // OSAL required parameter that isn't used in this function
  
  if ( events & SYS_EVENT_MSG )
  {
    uint8 *pMsg;

    if ( (pMsg = osal_msg_receive( gapRole_TaskID )) != NULL )
    {
      gapRole_ProcessOSALMsg( (osal_event_hdr_t *)pMsg );

      // Release the OSAL message
      VOID osal_msg_deallocate( pMsg );
    }

    // return unprocessed events
    return (events ^ SYS_EVENT_MSG);
  }

  if ( events & GAP_EVENT_SIGN_COUNTER_CHANGED )
  {
    // Sign counter changed, save it to NV
    VOID osal_snv_write( BLE_NVID_SIGNCOUNTER, sizeof( uint32 ), &gapRole_signCounter );

    return ( events ^ GAP_EVENT_SIGN_COUNTER_CHANGED );
  }
  
  if ( events & START_ADVERTISING_EVT )
  {
    if ( gapRole_AdvEnabled )
    {
      gapAdvertisingParams_t params;

      // Setup advertisement parameters
      if ( gapRole_state == GAPROLE_CONNECTED )
      {
        // While in a connection, we can only advertise non-connectable undirected.
        params.eventType = GAP_ADTYPE_ADV_NONCONN_IND;
      }
      else
      {
        params.eventType = gapRole_AdvEventType;
        params.initiatorAddrType = gapRole_AdvDirectType;
        VOID osal_memcpy( params.initiatorAddr, gapRole_AdvDirectAddr, B_ADDR_LEN );
      }
      params.channelMap = gapRole_AdvChanMap;
      params.filterPolicy = gapRole_AdvFilterPolicy;

      if ( GAP_MakeDiscoverable( gapRole_TaskID, &params ) != SUCCESS )
      {
        gapRole_state = GAPROLE_ERROR;
        if ( pGapRoles_AppCGs && pGapRoles_AppCGs->pfnStateChange )
        {
          pGapRoles_AppCGs->pfnStateChange( gapRole_state );
        }
      }
    }
    return ( events ^ START_ADVERTISING_EVT );
  }

  if ( events & RSSI_READ_EVT )
  {
    // Only get RSSI when in a connection
    if ( (gapRole_state == GAPROLE_CONNECTED)
        || (gapRole_state == GAPROLE_CONNECTED_ADV) )
    {
      // Ask for RSSI
      VOID HCI_ReadRssiCmd( gapRole_ConnectionHandle );

      // Setup next event
      if ( gapRole_RSSIReadRate )
      {
        VOID osal_start_timerEx( gapRole_TaskID, RSSI_READ_EVT, gapRole_RSSIReadRate );
      }
    }
    return ( events ^ RSSI_READ_EVT );
  }

  if ( events & UPDATE_PARAMS_TIMEOUT_EVT )
  {
    // Clear an existing timeout
    if ( osal_get_timeoutEx( gapRole_TaskID, UPDATE_PARAMS_TIMEOUT_EVT ) )
    {
      VOID osal_stop_timerEx( gapRole_TaskID, UPDATE_PARAMS_TIMEOUT_EVT );
    }

    // The Update Parameters Timeout occurred - Terminate connection
    VOID GAP_TerminateLinkReq( gapRole_TaskID, gapRole_ConnectionHandle, 
                               HCI_DISCONNECT_REMOTE_USER_TERM );

    return ( events ^ UPDATE_PARAMS_TIMEOUT_EVT );
  }

  // Discard unknown events
  return 0;
}

/*********************************************************************
 * @fn      gapRole_ProcessOSALMsg
 *
 * @brief   Process an incoming task message.
 *
 * @param   pMsg - message to process
 *
 * @return  none
 */
static void gapRole_ProcessOSALMsg( osal_event_hdr_t *pMsg )
{
  switch ( pMsg->event )
  {
    case HCI_GAP_EVENT_EVENT:
      if ( pMsg->status == HCI_COMMAND_COMPLETE_EVENT_CODE )
      {
        hciEvt_CmdComplete_t *pPkt = (hciEvt_CmdComplete_t *)pMsg;

        if ( pPkt->cmdOpcode == HCI_READ_RSSI )
        {
          int8 rssi = (int8)pPkt->pReturnParam[3];

          if ( ((gapRole_state == GAPROLE_CONNECTED)
                      || (gapRole_state == GAPROLE_CONNECTED_ADV))
              && (rssi != RSSI_NOT_AVAILABLE) )
          {
            // Report RSSI to app
            if ( pGapRoles_AppCGs && pGapRoles_AppCGs->pfnRssiRead )
            {
              pGapRoles_AppCGs->pfnRssiRead( rssi );
            }
          }
        }
      }
      break;

    case GAP_MSG_EVENT:
      gapRole_ProcessGAPMsg( (gapEventHdr_t *)pMsg );
      break;

    case L2CAP_SIGNAL_EVENT:
      {
        l2capSignalEvent_t *pPkt = (l2capSignalEvent_t *)pMsg;

        // Process the Parameter Update Response
        if ( pPkt->opcode == L2CAP_PARAM_UPDATE_RSP )
        {
          l2capParamUpdateRsp_t *pRsp = (l2capParamUpdateRsp_t *)&(pPkt->cmd.updateRsp);
          if ( pRsp->result == SUCCESS )
          {
            // All is good stop Update Parameters timeout
            VOID osal_stop_timerEx( gapRole_TaskID, UPDATE_PARAMS_TIMEOUT_EVT );
          }
        }
      }
      break;

    default:
      break;
  }
}

/*********************************************************************
 * @fn      gapRole_ProcessGAPMsg
 *
 * @brief   Process an incoming task message.
 *
 * @param   pMsg - message to process
 *
 * @return  none
 */
static void gapRole_ProcessGAPMsg( gapEventHdr_t *pMsg )
{
  uint8 notify = FALSE;   // State changed notify the app? (default no)

  switch ( pMsg->opcode )
  {
    case GAP_DEVICE_INIT_DONE_EVENT:
      {
        gapDeviceInitDoneEvent_t *pPkt = (gapDeviceInitDoneEvent_t *)pMsg;
        bStatus_t stat = pPkt->hdr.status;

        if ( stat == SUCCESS )
        {
          // Save off the generated keys
          VOID osal_snv_write( BLE_NVID_IRK, KEYLEN, gapRole_IRK );
          VOID osal_snv_write( BLE_NVID_CSRK, KEYLEN, gapRole_SRK );
          
          // Save off the information
          VOID osal_memcpy( gapRole_bdAddr, pPkt->devAddr, B_ADDR_LEN );

          gapRole_state = GAPROLE_STARTED;

          // Update the advertising data
          stat = GAP_UpdateAdvertisingData( gapRole_TaskID,
                              TRUE, gapRole_AdvertDataLen, gapRole_AdvertData );
        }

        if ( stat != SUCCESS )
        {
          gapRole_state = GAPROLE_ERROR;
        }

        notify = TRUE;
      }
      break;

    case GAP_ADV_DATA_UPDATE_DONE_EVENT:
      {
        gapAdvDataUpdateEvent_t *pPkt = (gapAdvDataUpdateEvent_t *)pMsg;

        if ( pPkt->hdr.status == SUCCESS )
        {
          if ( pPkt->adType )
          {
            // Setup the Response Data
            pPkt->hdr.status = GAP_UpdateAdvertisingData( gapRole_TaskID,
                              FALSE, gapRole_ScanRspDataLen, gapRole_ScanRspData );
          }
          else
          {
            // Start advertising
            VOID osal_set_event( gapRole_TaskID, START_ADVERTISING_EVT );
          }
        }

        if ( pPkt->hdr.status != SUCCESS )
        {
          // Set into Error state
          gapRole_state = GAPROLE_ERROR;
          notify = TRUE;
        }
      }
      break;

    case GAP_MAKE_DISCOVERABLE_DONE_EVENT:
    case GAP_END_DISCOVERABLE_DONE_EVENT:
      {
        gapMakeDiscoverableRspEvent_t *pPkt = (gapMakeDiscoverableRspEvent_t *)pMsg;

        if ( pPkt->hdr.status == SUCCESS )
        {
          if ( pMsg->opcode == GAP_MAKE_DISCOVERABLE_DONE_EVENT )
          {
            if ( gapRole_state == GAPROLE_CONNECTED )
            {
              gapRole_state = GAPROLE_CONNECTED_ADV;
            }
            else
            {
              gapRole_state = GAPROLE_ADVERTISING;
            }
          }
          else // GAP_END_DISCOVERABLE_DONE_EVENT
          {
            
            if ( gapRole_AdvertOffTime != 0 )
            {
              if ( ( gapRole_AdvEnabled ) )
              {
                VOID osal_start_timerEx( gapRole_TaskID, START_ADVERTISING_EVT, gapRole_AdvertOffTime );
              }
            }
            else
            {            
              // Since gapRole_AdvertOffTime is set to 0, the device should not
              // automatically become discoverable again after a period of time.
              // Set enabler to FALSE; device will become discoverable again when
              // this value gets set to TRUE
              gapRole_AdvEnabled = FALSE;
            }

            // In the Advertising Off period
            gapRole_state = GAPROLE_WAITING;

          }
        }
        else
        {
          gapRole_state = GAPROLE_ERROR;
        }
        notify = TRUE;
      }
      break;

    case GAP_LINK_ESTABLISHED_EVENT:
      {
        gapEstLinkReqEvent_t *pPkt = (gapEstLinkReqEvent_t *)pMsg;

        if ( pPkt->hdr.status == SUCCESS )
        {
          VOID osal_memcpy( gapRole_ConnectedDevAddr, pPkt->devAddr, B_ADDR_LEN );
          gapRole_ConnectionHandle = pPkt->connectionHandle;
          gapRole_state = GAPROLE_CONNECTED;

          if ( gapRole_RSSIReadRate )
          {
            // Start the RSSI Reads
            VOID osal_start_timerEx( gapRole_TaskID, RSSI_READ_EVT, gapRole_RSSIReadRate );
          }

          // Check whether update parameter request is enabled, and check the connection parameters
          if ( ( gapRole_ParamUpdateEnable == TRUE ) &&
               ( (pPkt->connInterval < gapRole_MinConnInterval) ||
                 (pPkt->connInterval > gapRole_MaxConnInterval) ||
                 (pPkt->connLatency != gapRole_SlaveLatency)    ||
                 (pPkt->connTimeout != gapRole_TimeoutMultiplier) ))
          {
            gapRole_SendUpdateParam( pPkt->connInterval, pPkt->connLatency );
          }
          
          // Notify the Bond Manager to the connection
          VOID GAPBondMgr_LinkEst( pPkt->devAddrType, pPkt->devAddr, pPkt->connectionHandle, GAP_PROFILE_PERIPHERAL );  
        }
        else
        {
          gapRole_state = GAPROLE_ERROR;
        }
        notify = TRUE;
      }
      break;

    case GAP_LINK_TERMINATED_EVENT:
      {
        VOID GAPBondMgr_ProcessGAPMsg( (gapEventHdr_t *)pMsg );
        osal_memset( gapRole_ConnectedDevAddr, 0, B_ADDR_LEN );
        
        if ( gapRole_state == GAPROLE_CONNECTED_ADV )
        {
          // End the non-connectable advertising
          GAP_EndDiscoverable( gapRole_TaskID );
          gapRole_state = GAPROLE_CONNECTED;
        }
        else
        {
          gapTerminateLinkEvent_t *pPkt = (gapTerminateLinkEvent_t *)pMsg;
          if( pPkt->reason == LL_SUPERVISION_TIMEOUT_TERM )
          {
            gapRole_state = GAPROLE_WAITING_AFTER_TIMEOUT;
          }
          else
          {
            gapRole_state = GAPROLE_WAITING;
          }

          notify = TRUE;

          VOID osal_set_event( gapRole_TaskID, START_ADVERTISING_EVT );
        }

        gapRole_ConnectionHandle = INVALID_CONNHANDLE;
      }
      break;

    case GAP_LINK_PARAM_UPDATE_EVENT:
      {
        gapLinkUpdateEvent_t *pPkt = (gapLinkUpdateEvent_t *)pMsg;

        if ( (pPkt->hdr.status != SUCCESS)
            || (pPkt->connInterval < gapRole_MinConnInterval)
              || (pPkt->connInterval > gapRole_MaxConnInterval) )
        {
          // Ask to change the interval
          gapRole_SendUpdateParam( pPkt->connInterval, pPkt->connLatency );
        }
        else
        {
          // All is good stop Update Parameters timeout
          VOID osal_stop_timerEx( gapRole_TaskID, UPDATE_PARAMS_TIMEOUT_EVT );
        }
      }
      break;
      
    default:
      break;
  }

  if ( notify == TRUE )
  {
    // Notify the application
    if ( pGapRoles_AppCGs && pGapRoles_AppCGs->pfnStateChange )
    {
      pGapRoles_AppCGs->pfnStateChange( gapRole_state );
    }
  }
}

/*********************************************************************
 * @fn      gapRole_SetupGAP
 *
 * @brief   Call the GAP Device Initialization function using the
 *          Profile Parameters.
 *
 * @param   none
 *
 * @return  none
 */
static void gapRole_SetupGAP( void )
{
  VOID GAP_DeviceInit( gapRole_TaskID,
          gapRole_profileRole, 0,
          gapRole_IRK, gapRole_SRK,
          &gapRole_signCounter );
}

/*********************************************************************
 * @fn      gapRole_SendUpdateParam
 *
 * @brief   Send an Update Connection Parameters.
 *
 * @param   connInterval - current connection interval
 * @param   connLatency - current connection latency
 *
 * @return  none
 */
static void gapRole_SendUpdateParam( uint16 connInterval, uint16 connLatency )
{
  l2capParamUpdateReq_t updateReq;  // Space for Conn Update parameters
  uint32 timeout;                   // Calculated response timeout
  
  // Calculate the current interval
  uint16 effectiveOldInterval = (connInterval * (connLatency + 1));
  
  // Calculate the interval we want
  uint16 effectiveNewMaxInterval = (gapRole_MaxConnInterval * (gapRole_SlaveLatency + 1));
  
  // Fill in the wanted parameters
  updateReq.intervalMin = gapRole_MinConnInterval;
  updateReq.intervalMax = gapRole_MaxConnInterval;
  updateReq.slaveLatency = gapRole_SlaveLatency;
  updateReq.timeoutMultiplier = gapRole_TimeoutMultiplier;
  
  VOID L2CAP_ConnParamUpdateReq( gapRole_ConnectionHandle, &updateReq, gapRole_TaskID );
  
  // Set up the timeout for expected response
  if( effectiveOldInterval > effectiveNewMaxInterval )
  {
    timeout = (uint32)(effectiveOldInterval) * CONN_INTERVAL_MULTIPLIER;
  }
  else
  {
    timeout = (uint32)(effectiveNewMaxInterval) * CONN_INTERVAL_MULTIPLIER;
  }
  
  if( timeout > MAX_TIMEOUT_VALUE )
  {
    timeout = MAX_TIMEOUT_VALUE;
  }
  
  VOID osal_start_timerEx( gapRole_TaskID, UPDATE_PARAMS_TIMEOUT_EVT, (uint16)(timeout) );
}

/*********************************************************************
*********************************************************************/
